On Sat, 26 Aug 2006 10:24:40 +0100, The Natural Philosopher wrote:

The Wanderer wrote:
On Sat, 26 Aug 2006 02:35:29 +0100, diezeltruck wrote:

Hi,

The programmer that controls my central heating and hot water fails to
communicate with the boiler and the boiler is continually 'ON'

Do a google for 'S plan'. You should be able to come up with wiring
diagrams for all the common variations of heating system.

The programmer is set at 'OFF' but the boiler still fires

Wiring mistake, possibly

The RET Electronic Room Thermostat that controls the central heating
also fails to switch the boiler off even when turned fully down.

Wiring mistake, possibly

Because of this my central heating is continually 'on' and the
thermostat fails to switch do anything in controlling the room temp as
the boiler fails to switch off.

It has been suggested that I have a faulty motorised valve which is
stuck in the 'on' position.

That alone won't give rise to the symptoms you describe. If the system has
been wired properly, then the controller overides any other auxiliary
switches (like the thermostat, the aux switches on the valves) in the
circuit.


Completely WRONG.

********. As usual, you pontificate on things with such conviction , and it
is *you* who is wrong. Do your homework, and take a google for 'S plan'
wiring diagrams. The info is out there if you take a look for it, it might
save you from looking so bloody stupid in future.

--
the dot wanderer at tesco dot net